ASTROSAT CZTI

Data Quality Report

Orbit 52840

Creation date: 2025-07-16T09:52:00.090425
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1C09_011T08_9000006482_52840cztM0_level2.fits modeM0/AS1C09_011T08_9000006482_52840cztM0_level2_quad_clean.evt
Size (bytes)1,975,605,120233,758,080
Size1.8 GB 222.9 MB
Events in quadrant A18,478,5021,522,481
Events in quadrant B22,014,4381,423,898
Events in quadrant C10,211,6611,582,894
Events in quadrant D20,996,6411,267,290

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0678613
B0783558
C0444613
D0754173

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03780
B03780
C03780
D03780

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A18556226612.211684%
B18556413322.273119%
C185564672.516706%
D18556343218.495365%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 19951 18559 2055 2055 10.30% 11.07%
B 19951 18559 2928 2928 14.68% 15.78%
C 19951 18559 333 333 1.67% 1.79%
D 19951 18559 3113 3113 15.60% 16.77%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 9 191 5631391 12047.26 1864 1819 467.3
A 3 62 1890551 4041.88 1864 1819 467.3
A 4 238 1096429 2342.46 1864 1819 467.3
B 8 3 11578448 31028.08 1760 1703 373.1
B 10 254 1425169 3815.18 1760 1703 373.1
B 1 239 554001 1480.27 1760 1703 373.1
C 15 224 1066254 2084.23 1855 1835 510.7
C 12 249 805120 1572.91 1855 1835 510.7
C 4 5 263937 513.22 1855 1835 510.7
D 8 176 6920215 14154.91 1708 1631 488.8
D 12 17 2217946 4534.42 1708 1631 488.8
D 3 224 977788 1997.14 1708 1631 488.8

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter